<template>
    <div>
        <!-- 面包屑导览 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片 区域-->
        <el-card>
            <!-- 提示 -->
            <el-alert
                title="消息提示的文案"
                type="info"
                center
                show-icon
                :closeable="false">
            </el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <!--tabs 栏-->
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price" type="number">
                            <el-input v-model="addForm.goods_price"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                             <el-cascader
                              v-model="addForm.goods_cat"
                              :options="catelist"
                              :props="{ expandTrigger: 'hover',label: 'cat_name', value: 'cat_id', children: 'children' }"
                              @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>

                    <!-- 商品商品参数参数 -->
                    <el-tab-pane label="商品参数" name="1">
                      <!-- 渲染表单item项-->
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <!-- 复选框 -->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>

                    <!-- 商品属性 -->
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- action 表示图片要上传的接口地址 -->
                        <el-upload
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture"
                        :headers="headerObj"
                        :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器 -->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <!-- 添加商品的按钮 -->
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>

        <!-- 图片预览-->
        <el-dialog
          title="提示"
          :visible.sync="previewVisible"
          width="50%">
            <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
// 导入 深拷贝组件
import _ from 'lodash'

export default {
  data () {
    return {
      activeIndex: '0',
      // 添加商品验证对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品详情 富文本编辑器
        goods_introduce: '',
        // 添加的数据
        attrs: []
      },
      // 添加商品规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性获取列表
      onlyTableData: [],
      // 上传图片的url地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的header请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览
      previewPath: '',
      previewVisible: false
    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    // 获取所有商品分类
    async getGoodsList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.$message.success('获取商品分类数据成功')
      this.catelist = res.data
    },
    // 级联选择器选中项变化 触发函数
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave (activeName, oldActiveName) {
      // console.log('即将进入和离开的标签页名' + activeName + oldActiveName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked () {
      // console.log(this.activeIndex)  访问动态参数面板
      if (this.activeIndex === '1') {
        // console.log('动态参数面板')
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数失败')
        }
        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数失败')
        }
        // console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果  file 图片信息
    handlePreview (file) {
      // console.log(file)  可以查看 file的数组的内容
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 移除图片操作
    handleRemove (file) {
      // console.log(file)
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.path === filePath)
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传事件
    handleSuccess (response) {
      // console.log(response)
      // 拼接得到图片对象 第二步 将图片信息对象 push 到pics 数组里面
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('填写必须要的表单项')
        }
        // 添加业务逻辑 这里 不能转化为字符串 与上面的数组冲突报错 需要使用深拷贝 里 lodash 的cloneDeep(被拷贝obj)
        // Form为 拷贝的 addform
        const Form = _.cloneDeep(this.addForm)
        Form.goods_cat = Form.goods_cat.join(',')
        // 处理动态参数 静态属性
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        Form.attrs = this.addForm.attrs
        // console.log(Form)
        // 发起请求添加商品  名称必须唯一
        const { data: res } = await this.$http.post('goods', Form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败,请检查是否填写完整')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox{
  margin: 0 5px 0 0 !important ;
}

.previewImg{
  width: 100%;
}

.btnAdd{
  margin-top: 15px;
}
</style>
